Thread cutter for sewing machines



Aug. 14,192

- C. JEBB THREAD CUTTER FOR SEWING MACHINES Filed dot. 15, 1926 INVENTDEPatented Aug. 14, 1928.

UNITED STATES CLARA JEBB, ORILLIA, ONTARIO, CANADA.

THREAD CUTTER FOR SEWING MACHINES.

Application filed October 16, 1926. Serial No. 142,116.

This invention relates to thread cutters and more particularly to thosecarried by the presser-foot of a sewing machine, and my object is toprovide the Presser-footwith 6 simple cutting means which is so locatedthat it may be readily reached by the operator and which is so formedthat there will be no danger of the operator nor the work being cut orcaught thereby.

I attain my object by providing the foot section of the presser-footwith a cutting edge. This is formed by making a notch in the verticaledge of the foot section whereby the cutting edge lies behind the planeof the said vertical edge and in the plane of the upper surface of thefoot section.

The constructions are hereinafter more fully described and illustratedin the ac 2 companying drawings in which Fig. 1 is a diagrammatic viewof parts of a sewing machine showing the position of the bobbin and theneedle thread across the cutting edge on the presser-foot;

Fig. 2 a plan view of the presser-foot;

Fig. 3 a side elevation thereof; and

Fig. 4 a cross section on the line 4l l in Fig. 2.

In the drawings like numerals of reference indicate corresponding partsin the different figures.

l is a Presser-foot which is carried in any suitable manner on thepresser-foot bar 2 and is provided with the usual foot section 1 Thissection is provided with an opening 3 for the passage of the needle land is substantially rectangular in cross section as usual. i

A cutting edge is provided by forming a notch in a vertical edge 1 ofthe foot section 1. The cutting edge is thus located behind the plane ofthe vertical edge and in or below the plane of the upper surface of thefoot section. From this it is obvious that the cutting edge is well outof the way of the operators fingers and the work being sewn so thatthere is no danger of their being cut.

It will also be noted that in my thread cutter there are no projectionsof any kind that are liable to catch the work which makes it possible tolocate the cutting edge in the most accessible position.

To provide a bevelled cutting edge the notch in the vertical edge 1 ofthe presser foot is undercut.

The mode of operation is as follows. When it is desired to cut thethreads 6 and 7 from the needle 4 and the bobbin (not shown), thepresser foot and the needle are raised in the usual manner and the workis drawn to one side thereof as shown in Fig. l. lVhile doing this theoperator grasps both threads at a by the left hand and, when suflicientthread has been drawn from the needle and the bobbin supply, boththreads are grasped by the right hand at b. The portions a to b of thethreads are then carried to a position above the presser-foot andpreferably in alinement with the cutting edge 5 so that the threads willbe cut when they are moved downwardly into contact with the cuttingedge. The notch also serves as a guide to direct the threads to thecutting edge should they be drawn along the edge 1 W hat I claim is:

A presser foot having its outer side forward of the needle opening ofthe foot meeting the upper surface substantially at right anglesthereto, the said side adjacent its forward end having a notch cuttherein sloping in a downward and inward direction to form a bevelledcutting edge at the upper surface of the foot, the said cutting edgeforming an indentation in the outer edge of the upper surface of thefoot, whereby threads may be cut by drawing them downwardly andtransversely against the cutting edge.

Signed at Orillia this 30th day of September 1926.

CLARA JEBB.

